作业帮532+793-232+117怎样简便计算快快快
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532+793-232+117怎样简便计算快快快
532+793-232+117怎样简便计算
快快快
532+793-232+117怎样简便计算快快快
532+793-232+117
=(532-232)+(793+117)
=300+910
=1210
(3x+2)(3x-2)-5x(x-1)-(2x-1)^2
=9x^2-4-5x^2+5x-4x^2+4x-1
=9x-5
=9*1/3-5
=-2 (3x+2)(3x-2)-5x(x-1)-(2x-1)^2
=9x^2-4-5x^2+5x-4x^2+4x-1
=9x-5
=9*1/3-5
=-2 (3x+2)(3x-2)-5x(x-1)-(2x-1)^2
=9x^2-4-5x^2+5x-4x^2+4x-1
=9x-5
=9*1/3-5
=-2